Systems in human body

• arteries


  blood vessels transporting blood away from the heart
• capillaries


  the smallest blood vessel in the circulatory system
• veins


  blood vessels transporting blood towards the heart
• Lung


  Vein transports blood towards the heart
• Artery


  transports blood away from the heart
• ligaments


  tough, flexible tissue which attaches bones to bones
• tendons


  tough, inelastic tissue which attaches muscles to bones
• cartilage


  tough, rubbery tissue that forms a cushion between bones
• locomotion


  the ability to move from one place to another
• metabolism


  all the chemical reactions in the body
• excretion


  the removal of waste products from the body
• osmoregulation


  the regulation of the water content of the body
• filtration


  when substances are separated from each other by using a filter
• absorption


  when substances move across a membrane
• electrolytes


  salts that are dissolved in your blood and other bodily fluids that carry an electric charge
• reproduction


  to make more organisms or living things
• extinct


  a species has died out completely and there are no living members left
• offspring


  the young produced by an organism
• gametes


  the sex cells also called sperm cells and egg cells
• fertilisation


  fusion of the egg and the sperm
• embryo


  early developmental stage
• genetic information


  inherited information that is passed on from parents to the young
• Reproduction can be sexual or asexual
• Asexual reproduction


  In asexual reproduction there is only one parent. The offspring are identical to the parent.
• Asexual reproduction in plants and simple animals

  • a piece of the plant such as the leaf, stem or root can grow into a new plant
  • amoebas can reproduce by dividing into two
• Sexual reproduction


  In sexual reproduction there are two parents. The parents have reproductive organs that make sex cells or gametes.
• Fertilisation


  A new life starts when an egg cell and a sperm cell join
• The fertilised egg cell divides to form a ball of cells. It becomes the embryo and will eventually develop into a new individual.
• Sexual reproduction allows for variations to occur in an individual.
• Fertilisation


  occurs when the nucleus of one sperm cell fuses with the nucleus of one egg